What are virtue and vice, and how do they relate to other moral properties such as goodness and rightness? Thomas Hurka defends a distinctive perfectionist view according to which the virtues are higher-level intrinsic goods, ones that involve morally appropriate attitudes to other, independent goods and evils. He develops this highly original view in detail and argues for its superiority over rival views, including those given by virtue ethics.
While I enjoyed reading Hurka's detailing of vices, my overall impression is a failure to be impressed. Sorry Hurka, I just don't think there's a mathematical equation for virtue. This is taking graphs to a whole new level.